Groover saw



Jan. 1, 924 1,479,514

A. M. REMINGTON GROOVER SAW Filed Sept. 19. 1922 T l n l I I a I Patented Jan. 1, 1924.

UNITED STATES PATENTQFF ICE.

GHUSET'IS, A CORPORATION OF MASSACHUSETTS GRO OVER SAW.

Application filed September This invention relates to the wood working art and in particular to a type of tool for producing grooves in wood'commonly called groover saws,

Objects of the invention are to provide devices of the class described each of which shall be adapted to cut a groove of a-certain fixed width, which shall require adjustment only for the depth of the groove, which produces grooves having clean cut sides regardless of the direction in which the grain runs and without splintering or chipping the wood, which may be easily sharpened, and in general to improve such devices to the end that they may be efficient and satisfactory in service. j v

For the purpose of illustrating the invention one concrete embodiment thereof is shown in the accompanying drawing in which:

Fig. 1 is a plan view;

Fig. 2 is an elevational view;

Fig. 3 is a section on the line 33 of Fi 1;

Fig. 4 is a sectional view of a piece of wood as initially cut by the markers; and

Fig. 5 is a view similar to Fig. 4 showing the completed groove.

The embodiment of the invention shown for the purpose of illustration comprises a blade A circular in form and provided with markers 6 and rakers 7 on the periphery thereof. Markers 6 extend slightly beyond rakers 7 (Fig. 1) and serve to mark orcut the wood at each side of the groove to be made. Markers 6 are preferably in pairs, these pairs being disposed in alternation with rakers 7, the latter serving to remove the material between the cuts or marks made by markers 6.

The pairs of markers 6 are cut away on opposite sides as indicated in Fig. 2, at first.

rather sharply at 8, then more gradually for a considerable distance as indicated at 9, and then a ain sharply at 10, so that the cutting edges ormed by the last bevel at 10 lie in and useful Improvements fil of which the following 6 19, 1922. Serial- 110,589,184.

the planes of the as shown inFig. l are concentric with the arcis ofplate are serrated as indicated in Figs. 1 and 2 forming teeth 11.

entire length of. the markers 6 to form elongate coplaner ridges which gouge out or rasp away the wood initially cut by teeth 11 and thus prevent binding of markers 6 in the wood as the latter is'being worked on. p

Bakers 7 are made with a substantial hook end or forwardly viding a cutting edge 14 extending transversely of blade .A and which acts as a chisel in cutting out the material between the parallel faces ofthe blade A, The cutting edges of markers6, which T ese grooves 12' are inclined surface 13, pro

marks made by markers 6 to form the groove 1n the wood. From the cutting edge 14., each raker 7 preferably tapers rearwardly at 15 (Fig. 1) to ,afiord clearance.

rakers are preferably narrower than the groove to prevent chipping the edges ofthe eled at the sides as indicated at 16 in Fig. 2.

In operation the saw is mounted for rotation inthe usual saw table and the stock is forced over the projecting sector of the saw. Since the markers 6 project beyond the groove and the rakers may be slightly. bevrakers 7, the former first engage the stock producing shallow parallel cuts 6 as indicated in Fig. 4. As the stock Bis advanced the cuts 5 which define the sides of the groove become deeper and the cutting teeth or edges 14 of the rakers 7 begin to remove the material between the cuts 6, the com pleted groove being shown in Fig, 5.

From the above it will be apparent that a saw constructed in accordance with. the disclosure of this application is adapted to produce grooves having clean cut sides without splintering orotherwise defacing the material, that the saws may be made of any desired size and of thickness to correspond to the width of the groove to be cut, and that the fashioning of the projections 6 forming the markers is such as to provide cutting teeth of great strength which willmake a clean out and not bind by reason of the grooves 12 on the cut away faces of the teeth which rasp away the Wood and also serve as guides in sharpening teeth 11, and

that the'onlyadjustment necessary isfor the depth of-the groove;

I claim:

1. Azgrooversawi comprising a blade haw inga integral utters disposed .in the planes of the faces of the blade respectively to mark the outside dimensions of the groove to be made, said cutters tapering arcuatel'y from the cutting edges thereof to the full width of the blade, the curving sides of said cutters being ridged transversely as respects the cutting edgeto rasp away the Wood during. the marking operation, and means arranged alternately with said cutters along said blade to rake the material between the marks made by said cutters.

21 A 'groover, saw comprising a circular blade, axially spaced radial cutters arrange in pairs .onsaid .blade to markthe width ofthe groove and cutters between the pairs having transverse cutting edges for removing the materialbetween the marks produced by said first cutters, the pairs of cutters being diametrically oppositely disposed and the sides of the teeth of a pair and the ensuingcutter having parallel front faces.

3. A groover saw comprising a circular blade'liavingpairs of circumferentially di rected cutters. spaced about said blade, said cutters being; adapted to mark the width of the groove to be cut, and where interposed between said'pairs of cutters, the pairs of cutters having parallel bounding front and rear faces and the raker associated with each pair having its bounding faces parallel with those. of its cutters, to remove the material between themarks made by said cutters.

reagent 4. Ar rotary saw comprising a circular body portion having diametrically opposed extensions each providing a pair of teeth, the oppositesides of the teeth of .a.v pair being formed with correspondingly outwardly curving grooves and ribs intermediate the grooves, the termini of the teeth at the ribs and grooves being outwardly beveled to provide cutting points corresponding in number and location to the ribs, the cutting points of the adjacent pair of teeth being disposed at opposite faces of the body portion and separated by the width of such portion.

5. A rotary saw comprising a body portion having integral diametrically opposed extensions each split to; provide a pair of teeth, the opposite sides of the teeth of a pair being formed outwardly curving grooves providing intermediate ribs and the termini of the ribs and grooves being outwardly beveled to provide cutting points corresponding in number an location to the ribs of he main teeth, the cutting portions of the adjacent pair of teeth being disposed at opposite-faces of the body portion and separated by said body portion and raker teeth intermediate the pairs for clearing outthe mate'rial therebetween, said raker teeth being outwardly tapered to a thickness less than the space between the cutting points and greater than the space between the ribs.

Signed by me at Fitchburg, Massachusetts, this 24cth day of August, 1922.

ALFRED M. aEMiueroN.

with correspondingly the width of 

